Cpi Aragon 50 GP vs Peugeot Speedfight

The Cpi Aragon 50 GP passes its MOT first time more often than the Peugeot Speedfight: 65.4% vs 65.2%, a 0.2-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	Cpi Aragon 50 GP	Peugeot Speedfight
First-time pass rate	65.4%	65.2%
Outright fail rate	24.9%	26.3%
Vs comparable bikes (age & mileage adjusted)	-9.2 pts	-5.3 pts
Engine size	49cc	49cc
Rank among all models	#4997 of 5428	#5008 of 5428
Median miles at test	4,838	13,547
MOT tests analysed	393	83,728
Most common failure	lighting and signalling	lighting and signalling

First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.

"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.

Pass rate by test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	Cpi Aragon 50 GP	Peugeot Speedfight
2011	61.0%	60.9%
2012	58.1%	61.2%
2013	73.8%	61.2%
2014	69.2%	61.7%
2015	59.2%	64.4%
2016	69.8%	63.0%
2017	63.3%	68.5%

Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	Cpi Aragon 50 GP	Peugeot Speedfight
0k-10k miles	67.0%	73.1%
10k-20k miles	65.7%	63.3%

Bands with fewer than 30 tests for either bike are left out.

CPI ARAGON 50 GP 65.4% pass · 393 tests PEUGEOT SPEEDFIGHT 65.2% pass · 83.7k tests

See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.